Electronic Sources

1).http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/History_overveiw.html

2).http://www.scugog-net.com/room108/math.html

3).http://www.scugog-net.com/room108/Game15/game14.htm

4).http://www.netrover.com/~kingskid/adding.html

We would also like to thank

Mr. Chuck Burgett, Educational, Technologist of

Jackson Elementary School, Ft. Campbell, KY

and Mrs. Watts, Computer and TAG teacher of